Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
  • F16K51/02—Other details not peculiar to particular types of valves or cut-off apparatus specially adapted for high-vacuum installations
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/44—Mechanical actuating means
  • F16K31/56—Mechanical actuating means without stable intermediate position, e.g. with snap action
  • F16K31/563—Mechanical actuating means without stable intermediate position, e.g. with snap action for rotating or pivoting valves

Definitions

• the present invention relates to a quick-release valve having a base, with a valve seat, with a valve disc and with a biasing member, wherein the valve disc between an open position and a closed position is movable, wherein the valve disc in the closed position bears against the valve seat and wherein the Biasing element biases the valve disc in the closed position.
• quick-acting valves are used, which are able to close a valve seat extremely fast. Because of strong radiation exposure in the accelerator tunnels preferably metallic sealing valves are used, and it is also common, a combination of not fully sealing quick-closing valve (leakage rate ⁇ 5 mbar 1 / sec) with a slowly closing metallic sealing ultra-high vacuum valve (leakage rate ⁇ 10 ⁇ 10 mbar 1 / sec). In the design of such a quick-acting valve is to be considered that a pressure wave in a vacuum system with about three times the speed of sound propagates ( ⁇ 1000m / s).
• the time required by the quick-closing valve to closes determines the distance that the quick-closing valve must have at least from the area in which a pressure wave can be triggered and detected to make sure that the area to be shielded behind the quick-acting valve is effectively protected from damage.
• a closing time of about 10 ms, it follows that this distance must be around 10 m. If you want to reduce this distance, the closing times must be reduced.
• a quick-acting valve which has a valve seat arranged in a housing, wherein the valve seat is connected to the region to be protected of a vacuum system.
• the valve seat may be closed by a valve disk pivotally mounted within the housing and adjustable between a closed position in which the valve disk abuts the valve seat and an open position.
• the valve disk is accelerated by a biasing element, in this case a coil spring, when the valve is triggered in the closed position, this tension spring is also mounted in the housing and thus on the vacuum side of a base.
• a disadvantage of this quick-release valve according to the prior art is that a complex pivot bearing for the valve disk inside the housing is required to ensure a short closing time.
• the pivot bearing for the valve disk must be mounted on the vacuum side and therefore lubrication is not possible.
• this object is achieved in that a drive rod is provided, at the end of the valve disc is pivotally mounted, that the drive rod is slidably connected in the axial direction in the base and with the biasing member and that an elastic support member is provided, which the valve disc connects to the base.
• the vacuum-side structure of the quick-closing valve according to the present invention is considerably simplified in comparison to the prior art, which on the one hand has the advantage that in a structurally simple manner a valve with a closing time of less than 10 ms can be realized.
• an improvement of the vacuum-compatible design is achieved, in which the quick-acting valve according to the invention has fewer regions which have a small pump cross-section and are thus problematic in terms of vacuum technology.
• the elastic bearing element may be formed as a leaf spring; but it is also conceivable that other embodiments are used for the storage element. In this case, the elastic bearing element must allow a pivoting movement of the valve disk, wherein the bearing element defines together with the drive rod in the closed position, the position of the valve disk relative to the valve seat.
• the drive rod has a joint, so that during the pivoting movement of the valve disk and the associated movement of the valve disk transversely to the direction of extension of the drive rod, there is no tension in the drive rod, which could slow down the closing movement.
• a bellows may be provided on the base, wherein the bellows extends in the axial direction of the guide rod and the drive rod is secured to the free end of the bellows.
• the guide rod can be passed through the base, without the need for a complicated sealing arrangement, which allows an axial movement of the drive rod, while still maintaining a high density.
• the bellows also allows for a slight movement of the drive rod transversely to its direction of extension, which may be required by the pivotal movement of the valve disk when closing.
• the biasing element is provided on the side facing away from the valve plate side of the base, so that this no longer has to be arranged on the vacuum side in contrast to the prior art and the number of parts arranged on the vacuum side of the quick-acting valve according to the invention further reduced.
• the lifting device In order to operate the quick-release valve remotely, it is also preferred to provide a lifting device which is connected to the end remote from the valve plate end of the drive rod.
• the lifting device can be configured in a particularly preferred manner as a compressed air cylinder.
• the drive rod is displaceable in the axial direction relative to the lifting device and the displacement stroke is dimensioned such that the drive rod can move the valve disk from the open position to the closed position without the lifting device having to be moved.
• the drive rod may have a locking projection on the side of the base facing away from the vacuum, and a movable locking pawl may be provided, the movable locking pawl being arranged to engage the locking projection when the valve disc is in the open position is.
• the drive rod can be released so that it can be moved by the pretensioning element into the closed position. is pressed and the valve seat is closed by the valve disc.
• FIG. 1 is a partially sectioned side view of the embodiment of a quick-acting valve according to the invention
• FIG. 2 shows the valve disk, the guide rod and the base of the embodiment of FIG. 1 in an enlarged view
• Fig. 3 shows the region of the guide rod of Fig. 1 in an enlarged view
• Fig. 4 is a section along the line IV-IV of Figure 1.
• a quick-acting valve As shown in Fig. 1, the preferred embodiment of a quick-acting valve according to the invention on a housing 1, which has a first opening 2 and a second opening 3 arranged opposite thereto.
• a valve seat 4 In the first opening 2, a valve seat 4 is inserted, the sealing surface 5 is arranged inclined to the axis 6 of the valve seat 4.
• a flange base 7 is detachably attached.
• an opening 8 is provided (see Fig. 2), through which a drive rod 9 extends.
• a bellows 10 is fixed, which extends in the axial direction of the drive rod 9 and whose remote from the base 7 free end 11 is connected to the drive rod 9, so that the drive rod 9 in the axial Rieh- tion in the base 7 is displaceable.
• the bellows 10 eliminates the need for a complicated implementation, on the one hand allow axial and angular movement of the drive rod 9 and on the other hand would ensure a high density.
• the bellows 10 allows movement of the drive rod 9 transversely to its direction of extension.
• the drive rod 9 on the side facing away from the vacuum of the free end 11 of the bellows 10 has a hinge 12.
• a valve plate 13 is pivotally mounted, wherein a damping spring 14 is provided between the valve plate 13 and the drive rod 9. Furthermore, a holder 15 is provided on the base 7, and a leaf spring 16 connects the holder 15 with the valve plate 13, wherein the leaf spring 16 forms an elastic bearing element.
• the drive rod 9 is displaceable in the axial direction in the base 7, the valve disc 13 between an open position, which is shown in FIGS. 1 and 2, and a closed position in which the valve disc 13 to the valve seat 4 at the sealing surface 5 is applied, to be moved.
• the leaf spring 16, which forms the elastic bearing element ensures that the valve disc 13 abuts the valve seat 4 as quickly as possible and in the correct orientation to the sealing surface 5.
• a mounting plate 17 is attached to one end of a trained as a compression spring 18 biasing member is supported.
• the free end of the compression spring 18 in turn presses against the drive rod 9, so that in the open position, the drive rod 9 and thus the valve disc 13 are biased in the direction of the closed position.
• the side facing away from the valve plate 13 end of the drive rod 9 a locking projection 19, to be engaged by a pivotable about an axis parallel to at ⁇ a rod 9 extending axis 20 locking pawl 21 (see Fig. 4).
• the locking pawl 21 can be disengaged via a lever arm 22 and a tension spring 23 and engaged with the electric lift cylinder 24 with the locking projection 19.
• the locking projection 19 is arranged with respect to the drive rod 9 so that it can engage with the locking pawl 21 when the drive rod 9 and thus the valve disc 13 are in the open position.
• the mounting plate 17 is designed as a compressed air cylinder 25 lifting device is provided, wherein the piston rod 26 of the air cylinder 25 is connected to the end remote from the valve plate 13 end of the drive rod 9.
• the connection between the piston rod 26 on the one hand and the drive rod 9 on the other hand is designed so that the drive rod 9 in its axial direction is displaceable relative to the compressed air cylinder 25.
• the displacement stroke x (see FIG. 3) is dimensioned so that the guide rod 9 can move the valve disk 13 from the open position into the closed position without the piston rod 26 and thus parts of the air cylinder 25 having to be moved.
• a return bolt 27 is provided for this purpose in the end of the guide rod 9, which is screwed into the free end of the piston rod 26.
• the head 28 of the return bolt 27 has the distance x from the end of the drive rod 9 when it is in the open position together with the valve disk 13 and the piston rod 26 is extended, as shown in FIG.
• the guide rod 9 can move down and bring the valve disc 13 in the closed position without the piston rod 26 has to move, as between the head 28 and the end of the drive rod 9, a corresponding displacement stroke x is provided.
• the leaf spring 16 ensures that the valve disk 13 when hitting the sealing surface 5 of the valve seat 4 has the correct orientation to the sealing surface 5 of the valve seat 4.
• further hinge elements such as pivot bearings must be arranged in the interior of the housing 1 on the vacuum-facing side of the base 7.
• Such joints would result in that in the housing 1 comparatively poor a sufficiently good vacuum can be generated, since joint elements compelling areas with poor pumping cross-section and lubrication of the bearing surfaces have.
• the compressed air cylinder 25 is actuated so that the piston rod 26 moves upwards.
• the drive rod 9 is thereby also moved upward until the locking pawl 21 engages with the locking projection 19.
• the piston rod 26 is lowered again, so that again the displacement stroke x between the head 28 of the return pin 27 and the end of the drive rod 9 is given.
• the quick-acting valve according to the invention allows closing times of less than 10 ms, which represents an improvement over the prior art. Furthermore, it is advantageous that the quick-acting valve according to the invention has fewer regions which have a small pump cross-section and are thus problematic in terms of vacuum technology.
• the structure according to the invention in which the base 7 is formed as a flange and in which all the moving parts are attached to the base 7, allows easy disassembly and maintenance.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Sliding Valves (AREA)
• Details Of Valves (AREA)
• Fluid-Driven Valves (AREA)
• Multiple-Way Valves (AREA)
• Check Valves (AREA)
• Lift Valve (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=38650803

Family Applications (1)

Country Status (4)

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Family Cites Families (3)

• 2006
  • 2006-08-22 DE DE102006039289A patent/DE102006039289B3/de not_active Expired - Fee Related
• 2007
  • 2007-08-20 WO PCT/EP2007/007334 patent/WO2008022762A1/fr active Application Filing
  • 2007-08-20 AT AT07801774T patent/ATE477442T1/de active
  • 2007-08-20 EP EP07801774A patent/EP2054657B1/fr not_active Not-in-force
  • 2007-08-20 DE DE502007004739T patent/DE502007004739D1/de active Active

Non-Patent Citations (1)

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